Mathematics College

Which of the following is a solution of the system 2x + y = 9 and 3x + 5y = 19.​

Answers

Answer 1

2x+y=9

3x+5y=19

I will do this problem in 2 ways. I.)Substitution II.)Elimination

Solution I.) Substitution

We can subtract 2x from both sides in the first equation.

y=9-2x

Now we can substitute the y in the second equation with 9-2x

3x+5(9-2x)=19

-7x+45=19

-7x=-26

x=26/7

y=9-2(26/7)=11/7

Solution II.)Elimination

We can multiply both side of first equation by 5 to get a 5y in both equations.

10x+5y=45

Now because both are positive 5y we just need to do simple subtraction of the 2 equation, each side respectively.

(10x+5y)-(3x+5y)=45-19

7x=26

x=26/7

2*26/7+y=9

y=11/7

Ultimately you get the same answer, both are viable methods, some problems are faster with one method but I recommend mastering both since they are very useful.

Related Questions

THIS IS DUE IN 10 MINUTES!!!

Answers

Yes the Frist question is 15 students

the second question is 5 well I mean if you do it by Khan academy

the third one is well three dozen eggs are cracked, so probably 12?

Can someone help me

Answers

Answer:

∠BDC=43°

Step-by-step explanation:

Since ABCD is a rectangle, ∠ADC=90

∠ADC=∠BDC+∠ADB

90=(7x+1)+(9x-7)

90=16x-6

16x=96

x=6

∠BDC=7x+1

=7(6)+1

=42+1=43

PLEASE HELP ME ASAP I AM BEGGING YOU. NO SPAM ANSWERS. Find the perimeter of the shaded regions below. Give your answer as a completely simplified exact value in terms of (no approximations). The figures below are based on semicircles or quarter circles and problems b), c), and d) are involving portions of a square. ONLY FIND THE PERIMITER PLZ​

Answers

Answer:

All i have is the area which is 4.5·π cm² + 18 cm² =

Step-by-step explanation:

Answer:

What is the perimeter

Who is kin to you?

Group of answer choices

a stranger

your cousin

The President

your teacher

Answers

Answer:

Your cousin

Step-by-step explanation:

Kin is your family/related family

If you can help thank you!​

Answers

9514 1404 393

Answer:

  C.  96 ft³

Step-by-step explanation:

The area of the triangular base is ...

  A = 1/2bh

  A = 1/2(6 ft)(8 ft) = 24 ft²

Then the volume is ...

  V = 1/3Bh . . . . . where B is the base area and h is the height

  V = 1/3(24 ft²)(12 ft) = 96 ft³ . . . . volume of pyramid

how many solutions does 6-3x=4-x-3-2x

Answers

Answer:

0

Step-by-step explanation:

6 - 3x = 4 - x - 3 - 2x

6 - 3x = -3x + 1

Add 3x to both sides.

6 = 1

Since the last equation, 6 = 1, is false after doing legal steps, that means that the equation is false and has no solution.

Answer: 0

Drag and drop the correct answer

Answers

Answer:

Axis of symmetry: [tex]-\frac{3}{7}[/tex]

The y-intercept: y= (0, -8)

The vertex is: [tex]( -\frac{3}{7} , -\frac{65}{7} )[/tex]

Step-by-step explanation:

My work is shown in the images... :)

I hope I helped, and I always appreciate brainliest!!!  :)

Can someone help me with these questions?!?!?!!? Pleasee!!! Like all of them.?????

Answers

#3 maybe be wrong, sorry if it is

HELP ASAP! WILL GIVE BRAINLIEST IF CORRECT!! Find the length of AB.

Answers

Answer:

A, about 9.4 units

Step-by-step explanation:

Answer:

A. About 9.4 units

Step-by-step explanation:

Fyjajrishe wkegeisjahshdhdhrheeejw

Answers

Answer:

vhcgixigcogcohvoycyoccohcistdotxkgclhfottitdtocogd

0162cm

Hope this helps

Which step explains how to find the value of a in 6a = 72?
a. add 6 to both sides
b. divide both sides by 6
c. multiply both sides by 6
d. subtract 6 from both sides

Answers

Answer:

b divide both sides by 6

Step-by-step explanation:

6a = 72 if you divided each side by 6 you will get

a = 12 which would bring you to the actual answer.

PLEASE PLEASE!
DUE TODAY!
I need to find x
[calling 10th graders or geometry]
will give brainliest and + points please!

Answers

angles sum: 180(6-2) = 720

50 + 37 + 42 = 129

129 + 5x + 7x - 1 + 3x + 40 = 720

15x + 168 = 720

15x = 552

x = 36.8

check:

129 + 5(36.8) + (3(36.8) + 40) + (7(36.8) - 1) = 720

Correct answer??

180-50 = 130

180-37 = 143

180-42 = 138

Known internal angles:

130 + 143 + 138 = 411

15x + 39 + 411 = 720

15x = 270

x = 18

x = 36.8
I’m sure of it

The picture below shows a shaded rectangular region inside a large rectangle.

What is the probability that a point chosen inside the large rectangle is not in the shaded region? (5 points)

A. 18%
B. 36%
C. 64%

Answers

Answer:

the answer is d

Step-by-step explanation:

17 mm
8 mm
9 mm
15 mm

Answers

Answer:

do you have to add the numbers together or multiply

Answer:

Solution given:

laternal section area =perimeter of triangle×length

=(15+8+17)×9=360mm²

LEXI BOUGHT A NEW CAR. SHE DROVE 33 MILES IN THE FIRST
MONTH THAT SHE OWNED THE CAR AND 35 MILES IN THE
SECOND MONTH THAT SHE OWNED THE CAR. HOW MANY




MILES DID LEXI DRIVE IN ALL DYRING THE FIRST TWO
MONTHS THAT SHE OWNED THE CAR?
PLz helP iLL mArK brAinLYesT !*+

Answers

ok so the first month is 33 + second month 35 will equal 68

|3v – 91 = -21
Please help! I can't find the solution for this equation

Answers

Answer:

3v=70

divide both side by 3

=70/3 or ~23.33333

Find the MAD of the data set: 2, 3, 4, 8, 10, 10, 12, 14, 18 (Round your answer to the nearest WHOLE NUMBER) ​

Answers

The answer is 4, have a good day

If you watch Mine-craft streamers, click this question.

No matter the streamer.

*ahem*

GeorgeNotFound once said,

"Oh, your positioning is soo good...〜"

Answers

stream·er

/ˈstrēmər/

Learn to pronounce

See definitions in:

All

Journalism

Fishing

Angling

Astronomy

noun

a long, narrow strip of material used as a decoration or symbol.

"plastic party streamers"

Similar:

pennant

pennon

flag

banderole

banner

standard

ensign

gonfalon

burgee

ribbon

vexillum

a banner headline in a newspaper.

"his appearance was announced with a streamer headline"

FISHING

a fly with feathers attached.

"a streamer fly"

Heyyy can u guys give me something because I’m out of points and need some thanksssssss

SHOW THE DECIMAL OF 55/100

Answers

Answer:

0.55

Step-by-step explanation:

The numerator of the fraction with a denominator of 100 is the number you put on the right of the decimal pt.

Answer:

0.55

Step-by-step explanation:

55/100 = 0.55

You just move decimal two places to the right. Hope this helps, thank you :) !!

Similar figures have _____________ sides and ___________ angles.

Answers

Answer:

same, equal measure

Hope it helps

Please mark me as brainliest

Thank you

On a coordinate plane, B C D E has points (2, 1), (2, 2), (4, 2), (4, 1). S R Q P has points (negative 4, 1), (negative 4, 2), (negative 2, 2), (negative 2, 1). L M J K has points (negative 4, negative 2), (negative 4, negative 1), (negative 2, negative 1), (negative 2, negative 2).
Which statements correctly describe the transformation in the graph? Select all that apply.
BCDE is rotated 180° counterclockwise to form JKLM.
BCDE is rotated 180° clockwise to form PQRS.
JKLM is rotated 180° clockwise to form BCDE.
JKLM is rotated 180° counterclockwise to form BCDE.

Answers

Answer:

Step-by-step explanation:

BCDE is rotated 180° counterclockwise to form JKLM.

JKLM is rotated 180° clockwise to form BCDE

JKLM is rotated 180° counterclockwise to form BCDE.

Answer:b c d

Step-by-step explanation:

i failed so you can sucseed

3 ⅕ -⅔ divided by 2 ⅘

Answers

You must perform some cancellations to arrive at the final answer. I hope this helps

Quadrilateral K’ is the image of quadrilateral K under a dilation. What is the center of the dilation?

Answers

Answer: The correct answer is D.

A carpenter can make at most 20 tables and at most 30 chairs per day. Each
table requires 3 hours of labour and each chair 2 hours of labour. The maximum
total of hours of labour that the carpenter has at his disposal is 96.
a. Give three inequalities that express the conditions above.
b. Graph and shade the common region that satisfies these inequalities.
c. Find the maximum number of chairs and tables that he can make within the
time at his disposal.​

Answers

Answer:Its B

Step-by-step explanation:

Find the equation for the line that passes through (4, - 8) that has slope - 2. Give your answer in
point-slope form. You do not need to simplify.

Answers

Answer:

y+8=-2(x-4)

Step-by-step explanation:

point-slope form is y-y1=m(x-x1) where m is the slope, and (x1,y1) is a point.

We are given all of that information:

slope: -2

point: (4,-8)

substitute the numbers into the equation

y--8=-2(x-4)

we can make --8 to positive 8

so:

y+8=-2(x-4)

this is the equation in point-slope form

Hope this helps!

Find the surface area. Explain.

Answers

Answer:

SA=136

Step-by-step explanation:

6*2=12

12*2=24

7*2=14

14*2=28

6*7=42

42*2=84

84+28+24

136

Answer:

Step-by-step explanation:

A rectangular prism has six sides so the area is the sum of the side areas.

A=2(xy+xz+yz) where x,y,z are the dimensions, in this case

A=2(2(6)+2(7)+6(7))

A=2(12+14+42)

A=2(68)

A=136 ft^3

WILL GIVE BRAINLIEST!!!! Name all of the transformations from h(x) = sinx to f(x) = −4 sin (3x – π) + 5 ANSWER ASAP FOR MORE POINTS!!!!

Answers

Answer:

Step-by-step explanation:

The -4 makes the waves taller (Amplitude 4), and the negitive flips over x-axis.

In (3x-pi) The three compresses horizontally making the waves tighter. The -pi shifts the funtion pi to the right.

The +5 shifts up five.

54=6b
what is the b
ASAP
HELP PLEASE ​

Answers

Answer:

b is 9

Step-by-step explanation:

okay

please mark me as brainlist and be happy also add me on sñap

arshad2623f

i will be happy <3

Answer:

its 9 this has to be at least 20 characters

I need help please, I have no clue how to answer this

Answers

Answer:

well then maybe you should pay attention in class

Step-by-step explanation:

Can the sides of a triangle have lengths 3, 6, and 8

Answers

Answer:

no, because the pythagorean theorem doesnt work out with those numbers.

Step-by-step explanation:

since (3^2)+(6^2) isnt 8^2

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